Test paper on how a computer stores data for Grade 4 students

Here’s a test paper on how a computer stores data for Class 4 students:

Class 4 Computer Science Test Paper

Topic: How Computers Store Data
Total Marks: 20
Time: 30 Minutes

Section A: Multiple Choice Questions (MCQs) – (5×1 = 5 Marks)

1. Which part of the computer is responsible for storing data permanently?
   1. RAM
   2. ROM
   3. Hard Drive
   4. CPU
2. Data in a computer is stored in the form of:
   1. Text only
   2. Numbers only
   3. Binary code (0s and 1s)
   4. Images only
3. Which type of memory loses data when the computer is turned off?
   1. RAM
   2. Hard Disk
   3. ROM
   4. Pen Drive
4. What is the smallest unit of memory in a computer?
   1. Byte
   2. Bit
   3. Kilobyte
   4. Megabyte
5. Which of the following is an example of external storage?
   1. RAM
   2. Hard Disk
   3. USB Pen Drive
   4. Cache Memory

Section B: Fill in the Blanks – (3×1 = 3 Marks)

1. The computer stores all data in the form of _______.
2. _______ memory retains data even after the computer is turned off.
3. A storage device that helps transfer data between computers is called a _______.

Section C: True or False – (3×1 = 3 Marks)

1. RAM stores data permanently. (True / False)
2. Computers store images and documents using binary code. (True / False)
3. External storage devices include USB drives and external hard disks. (True / False)

Section D: Short Answer Questions – (2×3 = 6 Marks)

1. Explain the difference between RAM and ROM.
2. What is the role of binary code in storing data on a computer?

Section E: Long Answer Question – (1×3 = 3 Marks)

1. Describe different types of computer storage devices with examples.

Here’s the answer key for the test paper on how computers store data:

Answer Key for Class 4 Computer Science Test Paper

Section A: Multiple Choice Questions (MCQs)

1. c) Hard Drive (Stores data permanently.)
2. c) Binary code (0s and 1s) (Computers store all data in binary format.)
3. a) RAM (RAM is volatile memory and loses data when power is turned off.)
4. b) Bit (A bit is the smallest unit of memory.)
5. c) USB Pen Drive (USB is an external storage device used for data transfer.)

Section B: Fill in the Blanks

1. The computer stores all data in the form of binary code.
2. ROM memory retains data even after the computer is turned off.
3. A storage device that helps transfer data between computers is called a USB drive.

Section C: True or False

1. False (RAM stores data temporarily, not permanently.)
2. True (Computers store all types of data using binary code.)
3. True (USB drives and external hard disks are examples of external storage devices.)

Section D: Short Answer Questions

1. Difference Between RAM and ROM:
   • RAM (Random Access Memory): Temporary memory used for active processes. Data is lost when the power is turned off.
   • ROM (Read-Only Memory): Permanent memory that stores system instructions and does not lose data when powered off.
2. Role of Binary Code in Storing Data:
   • Computers store all data using binary code (0s and 1s).
   • Each letter, number, and image is converted into a combination of binary digits.
   • It helps computers read and process information efficiently.

Section E: Long Answer Question

1. Types of Computer Storage Devices with Examples:
   • Primary Storage (RAM, ROM): Used for quick access while the computer is running.
   • Secondary Storage (Hard Drives, SSDs): Stores files permanently.
   • External Storage (USB Drives, Memory Cards): Used for portable data transfer.
   • Cloud Storage (Google Drive, OneDrive): Data is stored on internet-based servers.